22/28mm Universal Motorcycle Handlebar Riser Mount Heightening Clamp "Professional and practical design, beautiful and generous, make your motorcycle more beautiful. allows you to get a more comfortable ride and easier reach." Motorbike Handlebar Risers is A safe and reliable way to fit a narrower bar to a wider stem. Simply place one shim each side of clamp area on handlebar and insert into stem, tighten as normal.